Discharge valve for tanks



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2 Sheets-Sheet l J. J. WOBREDE-I DISCHARGE VALVE FOR TANKS Filed June 9, 1922 @sh 4S E@ J. J. MCBFEBE DISCHARGE VALVE FOR TANKS Filed June 9, 1922 Patented Oct. HG, 1925.

UNITED `sra-'ras .1,556,000 PATENT OFFICE.

.TOHN J'. McBItID, 0.F BAYONNE, NEW'JERSEY, ASSIGNOR'TO AMERCAN CAR AND vIOflIll'DlBfY ColllltPANY,A OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

DISCHARGE VALVE TANKS.'

Application led .Tune 9, 1922. Serial No. 567,045.

To all whom t may concern: .fa Be it known that I, JOHN J'. MoBnInE,

residing at Bayonne, -Hudson County, State of New Jersey, and being a citizen of the United States, have invented certain new and useful In'iprovements in a Discharge Valve for Tanks, of which the Jfollowing is a full,clear, and exact description, such as will enable others skilled in the art to which it appcrtains to make and to use the same, reference being had to the accompanying y drawings, which illustrate the preferred form of the invention, though it is to be understood `that the invention is not limited to the leiract details of construction shown and described, as it is obvious that various modifications' thereof within the 'scope of the claims. will occur to persons skilled in i the art.

In said drawings: y

' l Fig. 'l is a broken central vertical section of a' portion of 'a cartenlr showing my improved discharge valve applied thereto, the valve'being shown in closed position;

Fig. 2 is acentral vertical section of my discharge valve. thc valve being shown in Sopen position,

' Fig 3 is a top pian view of my discharge valve applied tov a car tank, parts being clearly g lines 4-4 and 5 5, respectively, of Fig. 2;

and v Fig. 6 is a partial bottom plan View of my discharge valve applied to a car tank.

It is an object of my invention to provide an improved discharge valve for car tanks that may be operated from outside of the tank. It is also an object of my invention to rovide a discharge valve of the self-grindmg type that may be operated upon the connecting and disconnecting ot the discharge conduit to the valve.

lith these and'other objects in View, my invention comprises a flanged discharge outlet` casing l, secured to a sheet 2 of a tank 3 by rivets 4. The outlet casing 1 is internally "screw-threaded at each end and, intermediate its ends, is provided with a shoulder 5. Threadedpinto the tank end of the casing 1 is a tubular valve cage 6 Slotted so as to provide discharge openings 7 and having a valve seat 8 adapted to receive a valve 9. The valve 9 is provided with a tubular stem broken away to show other parts morev Figs. 4 and 5 are sections taken on the 10, which serves as a discharge outlet for the tank, and an annular'projection 11, the pro-` gection 11 being adapted to engage a spring 12 which is confined between the valve 9 and a perforated cap or plate 13 which has a depressed lug 1.4 adapted to guide the other end of the spring 12 and is secured to the valve cage. 6 hy screws l5.

The tubular valve stern 10 is slotted, close to the valve 9, to .provide openings 16 and has a screw threaded portion 17 at its center while its outer end portion 18 is of slightly reduced diameter and is threaded as at 19 to receive a cap 20. Engaging the threaded portion 17 ot the stem 10 is a threaded collarv 21 having projections 22 which slidalily cngage in slots 23 and keep the collar 21 from turning. Rotating-the valve 9 will, therefore, cause the collar 21 to travel on the stem 10 the movement of the collar 21 being lim.

ited in one direction by engage-ment with the shoulder 5 and in the other direction by` engagenient with a stop 24 threaded into' the other end of the casing l. The stop.24,` which has a'shoulder 25 adapted to engage' the easing 1, serves as aA packing gland and` has an'inwardly projecting tapering shoulder 26 against which a. acking 27 is compressed hy the packing g and nut 28. Openings 29 in the stem- 10 serve to drain the easing 1. l

As my valve is to be operated without removing tlie usual manhole cover 30 provided t'or the opening 31 in the dome head 32, I provide an automatically operated 'valve 33 adapted to admit air to the tank as the tank contents-are withdrawn. The valve 33. comprises a casing 34 mounted in a. collar 35 riveted about an opening 36 in the' dome head 32, The casing 34 is tubular and has an angularly disposed outlet 37 having a perforated cap 38. One end of the casing 34 is closed by a. wall 39 4having an opening to receive the VaLve stem 40 of the valve 41 and' carries acap42 having an opening to receive the reduce end '4 3 ofthe stem 40. The valve 41 control. .an opening in a wall 44 in thel casing 34 and is normally held in closed position hy levers 45 which are pivotally supported from the casing 34 and are operated by the annular weight 46.

In the operation of 'my device, assuming the valve 9 in closed position and the tank 3 loaded, the cap 20 isremoved and the discharge pipe connected to the valve stern the discharge pipe 1s fully connected tothe stem `10, continued rotation of the coupling in the same direction will cause the stern 10 lis created inI the tank and-air enters the casingla valy through openings 7 in the valve cage 6,

openings 16 int iestem 10 and the stern I0 to the discharge pipe. As the contents are discharged from the tank, a -partial vacuum valve casing 34 through the perforated cap 38fand, raising valve 4l from its seat against the'resistance of the weighted levers. 45, passes into the tank. If desired, the valveA ll'imay be held in open position by screwindown the cap 43. .hc ith the valve` in open position, rotatino the'lcoupling in the Vopposite direction will cause; the stem 10 to travel in the' collar 2l untilfthe valve 9 engages the seat 8 whereuponi'the valve 9 will rotateu onjit's seat 8, grinding the valve to its seat, the collar 2l willfftravel on the stem 10 until the'projectiosf-'QQ engage the shoulder 5, locking the valve'9 to its seat and preventing further rotation of the valve'9 on its seat 8.

.With the valve 9 locked to itsseat, continued rotation of ithe coupling'will disconnect the discharge'lpipe from the valve 'stem 10.

1. In a'tank discl1arge.valve,a casing adapted toj be secured to the tank, a valve cage having egadapted to engage said seat, a disc arge. fiitlet carried by said casing adapted to force said valveto its s eat upon rotation of s'i'dfvalve.

2. Inl a taiilqdischarge valve, :t casing adapted to b'fsc'ured to the tank, a -valve cagehaving ava'lve seat carried by said casing, a' valve adapted-to engage 4said seat, a l

a .valve seat carried by said ving,

discharge outlet carried by saidvalve and means engaging said outlet and Icasing adapted to raise said valvefrom its seat i upon rotation of said valve.-

3. In -a tank discharge valve, a .casingm adapted to be secured to the tank, a valve cage having a valve seat carried by said casing, a valve engaging said seat, a discharge outlet carried bysaid valve, a 4cap carried by said cage and means engaging said ca "and valve adapted to hold said valve to sai seat.

4. In atank discharge valve, afcasing adapted to .be secured tothe tank, a .valve cage having a valve seat carried by said casing, a valve in said cage'adapted to engage said seat and' carrying a dlscharge outlet and means adapted to operate said valve upon a predetermined rotation of said outl'et..

5. In a tank discharge valve7 a casing adapted to be securedto tha-tank, a valve cage having a valve seat carried by said casing, a valve in said cage adaptedto engage said seat and carrying a .discharge outlet and means engagin said outlet and casing adapted to raise saivalve after a predetermined rotation of saigivalve'upon said seat.

6. In a tank disc argev valve, a casing adapted to be secured to the tank, avalve 'case having a valve ,seat carriedby said cas-` ing, a valve in said cage vadapted to engage said seatand carrying, a 4discharge outlet and a collar engaging said casing and outlet and causing operation of said valve upon rotation of said outlet.4

7. In a tank discharge valve, a casing adapted tobe secured to the tank, a valve case having avalve seat carried by said cassaid seat and carrying 'a discharge outlet, means adapted to operate said valve upon a avalve in said cage. adapted to engage" predetermined rotation of said outlet and means exerting pressure on said valve during the rotation of said valve upon said seat; l

In witness whereof I have hereunto set my hand. v l JOHN J. MCBRIDE. 

